<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Tool
 * @subpackage Framework
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Abstract.php 19145 2009-11-20 22:08:36Z beberlei $
 */

/**
 * @see Zend_Tool_Framework_Registry_EnabledInterface
 */
require_once 'Zend/Tool/Framework/Registry/EnabledInterface.php';

/**
 * @category   Zend
 * @package    Zend_Tool
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_Tool_Framework_Loader_Abstract implements Zend_Tool_Framework_Registry_EnabledInterface
{
	/**
	 * @var Zend_Tool_Framework_Repository_Interface
	 */
	protected $_registry = null;

	/**
	 * @var array
	 */
	private $_retrievedFiles = array();

	/**
	 * @var array
	 */
	private $_loadedClasses  = array();

	/**
	 * _getFiles
	 *
	 * @return array Array Of Files
	 */
	abstract protected function _getFiles();

	/**
	 * setRegistry() - required by the enabled interface to get an instance of
	 * the registry
	 *
	 * @param Zend_Tool_Framework_Registry_Interface $registry
	 * @return Zend_Tool_Framework_Loader_Abstract
	 */
	public function setRegistry(Zend_Tool_Framework_Registry_Interface $registry)
	{
		$this->_registry = $registry;
		return $this;
	}

	/**
	 * load() - called by the client initialize routine to load files
	 *
	 */
	public function load()
	{
		$this->_retrievedFiles = $this->getRetrievedFiles();
		$this->_loadedClasses  = array();

		$manifestRegistry = $this->_registry->getManifestRepository();
		$providerRegistry = $this->_registry->getProviderRepository();

		$loadedClasses = array();

		// loop through files and find the classes declared by loading the file
		foreach ($this->_retrievedFiles as $file) {
			if(is_dir($file)) {
				continue;
			}

			$classesLoadedBefore = get_declared_classes();
			$oldLevel = error_reporting(E_ALL | ~E_STRICT); // remove strict so that other packages wont throw warnings
			// should we lint the files here? i think so
			include_once $file;
			error_reporting($oldLevel); // restore old error level
			$classesLoadedAfter = get_declared_classes();
			$loadedClasses = array_merge($loadedClasses, array_diff($classesLoadedAfter, $classesLoadedBefore));
		}

		// loop through the loaded classes and ensure that
		foreach ($loadedClasses as $loadedClass) {

			// reflect class to see if its something we want to load
			$reflectionClass = new ReflectionClass($loadedClass);
			if ($reflectionClass->implementsInterface('Zend_Tool_Framework_Manifest_Interface')
			&& !$reflectionClass->isAbstract())
			{
				$manifestRegistry->addManifest($reflectionClass->newInstance());
				$this->_loadedClasses[] = $loadedClass;
			}

			if ($reflectionClass->implementsInterface('Zend_Tool_Framework_Provider_Interface')
			&& !$reflectionClass->isAbstract()
			&& !$providerRegistry->hasProvider($reflectionClass->getName(), false))
			{
				$providerRegistry->addProvider($reflectionClass->newInstance());
				$this->_loadedClasses[] = $loadedClass;
			}

		}

		return $this->_loadedClasses;
	}

	/**
	 * getRetrievedFiles()
	 *
	 * @return array Array of Files Retrieved
	 */
	public function getRetrievedFiles()
	{
		if ($this->_retrievedFiles == null) {
			$this->_retrievedFiles = $this->_getFiles();
		}

		return $this->_retrievedFiles;
	}

	/**
	 * getLoadedClasses()
	 *
	 * @return array Array of Loaded Classes
	 */
	public function getLoadedClasses()
	{
		return $this->_loadedClasses;
	}


}
